Steps to reproduce:

1. Open the attached project
2. Open the MainMenu Scene
3. Open the Multiplayer Play Mode Window and start a Virtual Player
4. Enter Play mode
5. In the Game view, enter a Player name and press Enter (This will enable the "Play Now!" button)
6. Press the "Play Now!" button (This will transition the menu to the lobby screen)
7. Repeat steps 5 and 6 in the Virtual Player window

Actual results: A crash occurs when the second client (The virtual player) joins the session

Expected results: Editor/Player does not crash. An error is displayed if referencing another client's ISession object is not permitted

Reproducible with versions: 1.1.0 (6000.0.59f1, 6000.2.10f1), 1.2.0 (6000.3.0b8, 6000.4.0a4)

Tested on (OS): macOS 26.0.1

Notes:

• In the reference project, the ISession object is passed via RPC call from the host to the client using a structure that inherits INetworkSerializeByMemcpy interface
• Tested by calling ISession.CurrentPlayer and ISession.PlayerCount